期刊名称：Oriental Journal of Computer Science and Technology
印刷版ISSN：0974-6471
出版年度：2010
卷号：3
期号：2
页码：261-264
语种：English
出版社：Oriental Scientific Publishing Company
摘要：Reduction of speckle noise is one of the most important processes to increase the quality of computed topographic images. Image variances or speckle is a granular noise that inherently exists in and degrades the quality of CT images. Before using CT images for diagnosis purpose, the very first step is to reduce the effect of Speckle noise. Most of speckle reduction techniques have been studied by researchers; however, there is no comprehensive method that takes all the constraints into consideration. Filtering is one of the common method which is used to reduce the speckle noises. This paper compares different speckle reduction filters and presents the performance analysis for reducing speckle noise in computed topographic images in terms of the assessment parameters PSNR and MSE.
关键词：Computed Tomography images ; Speckle Noise ; mean filter ; map filter ; median filter ; PSNR ; MSE
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